netconsd: Fix printing of uint64_t's in modules

Summary:
Building on arm64 currently warns with
```
logger.cc: In function 'void write_log(logtarget&, msg_buf*, ncrx_msg*)':
logger.cc:121:19: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'uint64_t' {aka 'long long unsigned int'} [-Wformat=]
   dprintf(tgt.fd, "%06lu %014lu %d %d %s%s%s%s%s\n", msg->seq,
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  ~~~~~~~~
logger.cc:121:19: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'uint64_t' {aka 'long long unsigned int'} [-Wformat=]
g++ logger.o -lpthread -lrt -ldl -shared -static-libstdc++ -static-libgcc \
		-o logger.so
```
It also segfaults as soon as it gets an extended message, due to the %lu trying to
read 8 bytes, while the argument is just 4.  Use a portable type to make the build
dtrt on x86-64 and arm64

Reviewed By: davide125

Differential Revision: D30970654

fbshipit-source-id: 6edc47d48486e2f66644bbec6405024d8e948cad

modules/logger.cc

@@ -12,6 +12,7 @@
 #include <cstring>
 #include <functional>
 #include <unordered_map>
+#include <inttypes.h>
 
 #include <fcntl.h>
 #include <netdb.h>
@@ -118,8 +119,9 @@ static void write_log(struct logtarget& tgt, struct msg_buf *buf,
 	if (!msg)
 		dprintf(tgt.fd, "%s\n", buf->buf);
 	else
-		dprintf(tgt.fd, "%06lu %014lu %d %d %s%s%s%s%s\n", msg->seq,
-			msg->ts_usec, msg->facility, msg->level,
+		dprintf(tgt.fd, "%06" PRIu64 " %014" PRIu64 " %d %d %s%s%s%s%s\n",
+			msg->seq, msg->ts_usec,
+			msg->facility, msg->level,
 			msg->cont_start ? "[CONT START] " : "",
 			msg->cont ? "[CONT] " : "",
 			msg->oos ? "[OOS] ": "",

modules/printer.c

@@ -10,6 +10,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <arpa/inet.h>
+#include <inttypes.h>
 
 #include <msgbuf-struct.h>
 #include <ncrx-struct.h>
@@ -37,7 +38,7 @@ void netconsd_output_handler(int t, struct in6_addr *src, struct msg_buf *buf,
 	if (!msg)
 		printf("%40s: %s\n", addr, buf->buf);
 	else
-		printf("%40s: S%06lu T%014lu F%d/L%d %s%s%s%s%s\n", addr,
+		printf("%40s: S%06" PRIu64 " T%014" PRIu64 " F%d/L%d %s%s%s%s%s\n", addr,
 			msg->seq, msg->ts_usec, msg->facility, msg->level,
 			msg->cont_start ? "[CONT START] " : "",
 			msg->cont ? "[CONT] " : "",